Apr 25, 2025 · Because Mercury is so close to the Sun, it is hard to directly observe from Earth except during dawn or twilight when the Sun's brightness doesn't outshine little Mercury. The …

Mercury is the first planet from the Sun and the smallest in the Solar System. It is a rocky planet with a trace atmosphere and a surface gravity slightly higher than that of Mars.

Mercury, any of the first series of crewed spaceflights conducted by the United States (1961–63). The series began with a suborbital flight about three weeks after the Soviet cosmonaut Yury …

Only two spacecraft have ever visited Mercury, and a third is on the way. It actually takes more energy for a spacecraft to reach Mercury than Pluto. Mercury is the fastest-orbiting planet in …

Dec 9, 2024 · During this flyby, BepiColombo became the first spacecraft ever to observe Mercury in mid-infrared light. The new images reveal variations in temperature and composition across …

Aug 17, 2025 · Using data from NASA's MESSENGER spacecraft, scientists have determined that the solar system's tiniest planet, Mercury, hides a not-so-tiny secret: a 10-mile-thick …

On December 1, 2024, BepiColombo completed its fifth flyby of Mercury. During this encounter, it became the first spacecraft to observe Mercury in mid-infrared light. These groundbreaking …

Oct 19, 2018 · Named for the fleet-footed Roman messenger god, Mercury is the closest planet to the sun, zipping around our parent star at an average of 36 million miles away. However, …

May 7, 2025 · Mercury is the closest planet to the Sun, and the smallest planet in our solar system - only slightly larger than Earth's Moon.

Project Mercury was the first human spaceflight program of the United States, running from 1958 through 1963. An early highlight of the Space Race, its goal was to put a man into Earth orbit …